:root {
    /* Colors */
    --color-primary: #d4a026;
    --color-primary-rgb: 212, 160, 38;
    --color-accent: #d4a026;
    --color-danger: #ff3333;
    --color-danger-rgb: 255, 51, 51;

    /* Backgrounds */
    --bg-dark: #0a0a0a;
    --bg-medium: #111111;
    --bg-light: #1a1a1a;
    --bg-overlay: rgba(0, 0, 0, 0.85);

    /* Text */
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.5);

    /* Borders */
    --border-color: rgba(255, 255, 255, 0.2);
    --border-strong: rgba(255, 255, 255, 0.4);

    /* Spacing */
    --corner-size: 20px;
    --stroke-width: 1px;

    /* Font */
    --font-family: 'Sora', 'IBM Plex Mono', sans-serif;
    --font-mono: 'IBM Plex Mono', 'Courier New', monospace;

    /* Transitions */
    --transition: all 0.2s ease;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    background: var(--bg-dark);
    color: var(--text-primary);
    overflow: hidden;
    letter-spacing: 0.02em;
}

h2 {
    font-size: 24px;
    font-weight: 900;
}

/* Utility classes for brutalist corners */
.corner-frame {
    position: relative;
}

.corner-frame::before,
.corner-frame::after {
    content: '';
    position: absolute;
    width: var(--corner-size);
    height: var(--corner-size);
    border-color: var(--text-primary);
    border-style: solid;
    pointer-events: none;
}

.corner-frame::before {
    top: 0;
    left: 0;
    border-width: var(--stroke-width) 0 0 var(--stroke-width);
}

.corner-frame::after {
    top: 0;
    right: 0;
    border-width: var(--stroke-width) var(--stroke-width) 0 0;
}

.corner-frame-bottom::before,
.corner-frame-bottom::after {
    content: '';
    position: absolute;
    width: var(--corner-size);
    height: var(--corner-size);
    border-color: var(--text-primary);
    border-style: solid;
    pointer-events: none;
}

/* Viewer Container */
#viewer-container {
    position: relative;
    width: 100vw;
    height: 100vh;
    background: var(--bg-dark);
}

#image-canvas {
    position: absolute;
    top: 0;
    left: 0;
    cursor: grab;
    background: var(--bg-dark);
}

#image-canvas:active {
    cursor: grabbing;
}

#interaction-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    cursor: grab;
}

#interaction-overlay:active {
    cursor: grabbing;
}

/* Controls Bar - Brutalist Style */
#controls {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 24px;
    background: var(--bg-dark);
    padding: 12px 24px;
    z-index: 100;
    border: var(--stroke-width) solid var(--border-color);
}

.control-group {
    display: flex;
    align-items: center;
    gap: 12px;
}

.control-divider {
    width: var(--stroke-width);
    height: 24px;
    background: var(--border-color);
}

button {
    background: transparent;
    border: var(--stroke-width) solid var(--border-color);
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 16px;
    font-weight: 400;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    text-transform: uppercase;
}

button:hover {
    background: var(--text-primary);
    color: var(--bg-dark);
    border-color: var(--text-primary);
}

button:active {
    opacity: 0.8;
}

#zoom-level {
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-weight: 400;
    min-width: 50px;
    text-align: center;
    font-size: 12px;
    letter-spacing: 0.05em;
}

.zoom-slider {
    margin-left: 8px;
}

#zoom-slider {
    width: 120px;
    height: 2px;
    background: var(--border-color);
    outline: none;
    cursor: pointer;
    -webkit-appearance: none;
}

#zoom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 12px;
    height: 12px;
    background: var(--text-primary);
    cursor: pointer;
}

#zoom-slider::-moz-range-thumb {
    width: 12px;
    height: 12px;
    background: var(--text-primary);
    cursor: pointer;
    border: none;
}

/* Icon Button */
.icon-button {
    background: transparent;
    border: var(--stroke-width) solid var(--border-color);
    color: var(--text-primary);
    width: 36px;
    height: 36px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0;
}

.icon-button:hover {
    background: var(--text-primary);
    color: var(--bg-dark);
    border-color: var(--text-primary);
}

.icon-button.active {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--bg-dark);
}

.icon-button.active:hover {
    background: var(--text-primary);
    border-color: var(--text-primary);
}

/* Loading Indicator */
#loading-indicator {
    position: absolute;
    bottom: 24px;
    left: 24px;
    display: none;
    align-items: center;
    gap: 12px;
    z-index: 100;
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
}

#loading-indicator.show {
    display: flex;
}

.spinner {
    width: 12px;
    height: 12px;
    border: var(--stroke-width) solid var(--border-color);
    border-top: var(--stroke-width) solid var(--text-primary);
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Face Mode Indicator */
#face-mode-indicator {
    position: absolute;
    top: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--bg-dark);
    color: var(--text-primary);
    padding: 8px 16px;
    font-family: var(--font-mono);
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    z-index: 90;
    border: var(--stroke-width) solid var(--color-primary);
}

/* ==========================================
   INTRO BLUR ANIMATION WITH RGB SHIFT
   ========================================== */

#intro-blur-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 500;
    overflow: hidden;
    background: var(--bg-dark);
    opacity: 0;
    visibility: hidden;
}

#intro-blur-container.ready {
    opacity: 1;
    visibility: visible;
}

#intro-blur-image {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    width: auto;
    object-fit: cover;
}

/* Fade transition for intro */
#intro-blur-container {
    transition: opacity 0.5s ease;
}

#intro-blur-container.fade-out {
    opacity: 0;
    pointer-events: none;
}

#intro-blur-container.hidden {
    display: none;
}

/* Welcome Overlay - Brutalist Integrated Style */
#welcome-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 1;
    transition: opacity 0.5s ease;
}

#welcome-overlay.fade-out {
    opacity: 0;
}

/* Particles Effect - Circular Layout */
#particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    pointer-events: none;
}

.particle {
    position: absolute;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 50%;
    transform: translate(-50%, -50%);
}

#particles-container.fade-out {
    opacity: 0;
    transition: opacity 0.5s ease;
}

#particles-container.hidden {
    display: none;
}

.particle.fade-out {
    opacity: 0;
    transition: opacity 0.5s ease;
}

#welcome-modal {
    display: block;
    position: fixed;
    z-index: 1001;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100%;
    max-width: 400px;
    padding: 40px;
    background: #000000;
    opacity: 0;
    transition: opacity 0.5s ease;
}

#welcome-modal.visible {
    opacity: 1;
}

#welcome-modal.hidden {
    display: none !important;
}

#welcome-modal.modal-hidden {
    opacity: 0;
}

/* Corner SVG frames */
.frame-corner {
    position: absolute;
    width: 24px;
    height: 24px;
    stroke: var(--text-primary);
    stroke-width: 1;
    fill: none;
}

.frame-corner.top-left {
    top: 0;
    left: 0;
}

.frame-corner.top-right {
    top: 0;
    right: 0;
    transform: rotate(90deg);
}

.frame-corner.bottom-left {
    bottom: 0;
    left: 0;
    transform: rotate(-90deg);
}

.frame-corner.bottom-right {
    bottom: 0;
    right: 0;
    transform: rotate(180deg);
}

.welcome-content {
    position: relative;
    padding: 32px;
}

.welcome-header {
    margin-bottom: 32px;
    text-align: left;
}

.welcome-header h2 {
    font-family: var(--font-family);
    font-size: 24px;
    font-weight: 900;
    text-transform: uppercase;
    color: var(--text-primary);
    margin: 0;
}

.welcome-header .subtitle {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-muted);
    margin-top: 8px;
    letter-spacing: 0.1em;
}

/* Form Styles - Brutalist */
.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-group input {
    width: 100%;
    padding: 12px 0;
    background: transparent;
    border: none;
    border-bottom: var(--stroke-width) solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 14px;
    transition: var(--transition);
    outline: none;
}

.form-group input:focus {
    border-color: var(--text-primary);
}

.form-group input::placeholder {
    color: var(--text-muted);
    font-size: 12px;
}

.form-group input.error {
    border-color: var(--color-danger);
}

.error-message {
    display: block;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--color-danger);
    margin-top: 8px;
    min-height: 14px;
    letter-spacing: 0.05em;
}

/* Brutalist Buttons */
.welcome-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-top: 32px;
}

button.btn-welcome {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    height: 48px;
    padding: 16px 24px;
    background: transparent;
    border: var(--stroke-width) solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: var(--transition);
    text-align: left;
}

button.btn-welcome:hover {
    background: var(--text-primary);
    color: var(--bg-dark);
    border-color: var(--text-primary);
}

button.btn-welcome.btn-primary {
    background: var(--text-primary);
    color: var(--bg-dark);
    border-color: var(--text-primary);
}

button.btn-welcome.btn-primary:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

button.btn-welcome span:first-child {
    display: flex;
    align-items: center;
    line-height: 1;
}

.btn-arrow {
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}

/* Modal Styles - Brutalist */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: var(--bg-overlay);
    align-items: center;
    justify-content: center;
}

.modal-content {
    position: relative;
    background: var(--bg-dark);
    width: 90%;
    max-width: 440px;
    padding: 40px;
    border: var(--stroke-width) solid var(--border-color);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 32px;
    padding-bottom: 16px;
    border-bottom: var(--stroke-width) solid var(--border-color);
}

.modal-header h2 {
    font-family: var(--font-family);
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-primary);
    margin: 0;
}

.close-button {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 12px;
    cursor: pointer;
    width: auto;
    height: auto;
    padding: 4px 8px;
    transition: var(--transition);
    letter-spacing: 0.1em;
}

.close-button:hover {
    color: var(--text-primary);
    background: transparent;
}

/* Form in modal */
#face-tag-form {
    padding: 0;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 32px;
    padding-top: 24px;
    border-top: var(--stroke-width) solid var(--border-color);
}

.btn-primary,
.btn-secondary,
.btn-danger {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 20px;
    background: transparent;
    border: var(--stroke-width) solid var(--border-color);
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-dark);
    border-color: var(--text-primary);
}

.btn-primary:hover {
    background: var(--color-primary);
    border-color: var(--color-primary);
}

.btn-secondary {
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--text-primary);
    color: var(--bg-dark);
    border-color: var(--text-primary);
}

.btn-danger {
    color: var(--color-danger);
    border-color: var(--color-danger);
}

.btn-danger:hover {
    background: var(--color-danger);
    color: var(--text-primary);
}

/* Coordinates display */
.coordinates {
    position: fixed;
    top: 24px;
    left: 24px;
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 0.05em;
    z-index: 50;
}

/* Responsive */
@media (max-width: 768px) {
    #controls {
        flex-direction: column;
        gap: 12px;
        padding: 16px;
    }

    .zoom-slider {
        margin-left: 0;
    }

    #zoom-slider {
        width: 160px;
    }

    #welcome-modal {
        max-width: 90%;
        padding: 20px;
    }

    .welcome-content {
        padding: 24px;
    }

    .modal-content {
        width: 95%;
        padding: 24px;
    }

    .form-actions {
        flex-direction: column;
    }

    .btn-primary,
    .btn-secondary,
    .btn-danger {
        width: 100%;
    }
}

.hidden {
    display: none !important;
}

/* ==========================================
   SIDEBAR PANEL - Full Height Sliding
   ========================================== */

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sidebar-overlay.active {
    opacity: 1;
    visibility: visible;
}

.sidebar {
    position: fixed;
    top: 0;
    right: 0;
    width: 100%;
    max-width: 480px;
    height: 100vh;
    background: var(--bg-dark);
    border-left: var(--stroke-width) solid var(--border-color);
    z-index: 1001;
    transform: translateX(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.sidebar.active {
    transform: translateX(0);
}

.sidebar-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 24px 32px;
    border-bottom: var(--stroke-width) solid var(--border-color);
    flex-shrink: 0;
}

.sidebar-title {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.sidebar-label {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--color-primary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
}

.sidebar-title h2 {
    font-family: var(--font-family);
    font-size: 20px;
    font-weight: 500;
    color: var(--text-primary);
    margin: 0;
    letter-spacing: 0.02em;
}

.sidebar-content {
    flex: 1;
    overflow-y: auto;
    padding: 0;
}

.sidebar-content::-webkit-scrollbar {
    width: 4px;
}

.sidebar-content::-webkit-scrollbar-track {
    background: var(--bg-dark);
}

.sidebar-content::-webkit-scrollbar-thumb {
    background: var(--border-color);
}

.sidebar-content::-webkit-scrollbar-thumb:hover {
    background: var(--border-strong);
}

/* Form Sections */
.form-section {
    padding: 24px 32px;
    border-bottom: var(--stroke-width) solid var(--border-color);
}

.form-section:last-of-type {
    border-bottom: none;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--text-muted);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: var(--stroke-width) solid var(--border-color);
}

/* Form fields in sidebar */
.sidebar .form-group {
    margin-bottom: 16px;
}

.sidebar .form-group:last-child {
    margin-bottom: 0;
}

.sidebar .form-group label {
    display: block;
    font-family: var(--font-mono);
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.sidebar .form-group input,
.sidebar .form-group textarea {
    width: 100%;
    padding: 12px 0;
    background: transparent;
    border: none;
    border-bottom: var(--stroke-width) solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 14px;
    transition: var(--transition);
    outline: none;
    resize: none;
}

.sidebar .form-group textarea {
    padding: 12px;
    border: var(--stroke-width) solid var(--border-color);
    min-height: 100px;
}

.sidebar .form-group input:focus,
.sidebar .form-group textarea:focus {
    border-color: var(--text-primary);
}

.sidebar .form-group input::placeholder,
.sidebar .form-group textarea::placeholder {
    color: var(--text-muted);
    font-size: 12px;
}

/* Form actions in sidebar */
.sidebar .form-actions {
    display: flex;
    gap: 12px;
    padding: 24px 32px;
    border-top: var(--stroke-width) solid var(--border-color);
    background: var(--bg-dark);
    flex-shrink: 0;
}

/* Responsive for sidebar */
@media (max-width: 768px) {
    .sidebar {
        max-width: 100%;
    }

    .sidebar-header {
        padding: 20px 24px;
    }

    .form-section {
        padding: 20px 24px;
    }

    .sidebar .form-actions {
        padding: 20px 24px;
        flex-direction: column;
    }

    .sidebar .form-actions button {
        width: 100%;
    }
}